Matrix properties
number of rows	19,242
number of columns	19,242
nonzeros	9,323,432
structural full rank?	yes
structural rank	19,242
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	binary
structure	symmetric
Cholesky candidate?	yes
positive definite?	no

author	A. Andrianov
editor	T. Davis
date	2006
kind	optimization problem
2D/3D problem?	no

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	48,387,996	29,153,727
Cholesky flop count	2.5e+11	7.1e+10
nnz(L+U), no partial pivoting	96,756,750	58,288,212
nnz(V) for QR, upper bound nnz(L) for LU	111,971,884	-
nnz(R) for QR, upper bound nnz(U) for LU	178,957,024	-

Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.